5H 

Acronym for Fifth Harmony, an American girl group formed on X factor USA in July of 2012.

Jessica: DiD YOU HEAR 5H's NEW SONG??!?!?
Mary: 5H? Whats that?
Jessica: FIFTH HARMONY!!!
Mary: OMG YES I HEARD IT. FRICKEN LOVED IT.

5H by ayyejauregui April 14, 2015

5 H's 

The most necessary things when it comes down to which guy is eligible or not: Hair, humor, height, human decency, and hygiene.

Friend: Dude I really like him.
Me: Does he qualify with the 5 H's?
Friend: Not sure.

5 H's by swaagmaster420 January 21, 2021

5head 

When you have a very large brain and is very smart

Bro, 5head moment

5head by Bradley Bubbles Smith July 1, 2019

5head 

When someone is called a 5head, they're usually really smart. The idea is that big foreheads = more brain = bigger smart.

person 1: *solves something
person 2: you see that! That is a 5head moment right there

5head by Zimbaycoleo December 7, 2020

5HTP 

5-HTP (5-hydroxytryptophan) is the direct precursor to serotonin. It is used as therapy for some forms of depression.

Users of the party drug MDMA may are advised to take 5-HTP supplements to ease the effect of serotonin depletion caused by MDMA. Many MDMA users take 5-HTP to try to enhance their high.

5-HTP helps replenish serotonin levels in the brain.

5HTP by fu March 30, 2003

5Head 

When someones forehead is so big that it can no longer be called a forehead it is a 5Head

Dude 1: Wow your forehead is so huge
Dude 2: I know I have a 5Head

5Head by Rawrtino December 17, 2008

5h17 

shit
1337 for shit

I need to take a 5h17.

5h17 by 1337 h4x0r April 14, 2003